Note-sheet-tracking device.



T. DANQUARD. NOTE SHEET TRACKING DEVICE.

v APPLICATION FILED AUG.25, 19H.

1,255,296. Patented Feb. 5, 1918..n

` Ulf. r`I Y I UNITED strains- PATENT cierren.

THOMAS DAN'QUARD, OF NEW YORK, N. Y.,y ASSIGNO'R, TO AUTO PNEUMATIC ACTION COMPANY, A CORPORATION OF NEW YORK.

NOTE-SHEET--TRACKING DEVICE.

Specication of Letters Patent.

Application led August 25, 1911.. Servi-a1 No. 648,054. j

To aZZ whom 'it may concern.'

Be it known that I, THOMAS DANQUARD, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful N cte-Sheet-Tracking Device, of which the following isa specification.

The object of this invention is to provide a new and improved device for keeping the perforated note sheet employed in connection with the tracker bar in musical instruments `and similar devices automatically in proper registration.

To this end the invention consists in providing a single guide opening and two pneumatic motors, which are arranged to operate in one direction when-the guide opening is covered, and in the other direction when the guide opening is uncovered, said motors being connected to adjust the relation between the note sheet and tracker, and vtherefore to keep the note sheet in proper registration with the tracker bar within the limits of the covering and uncovering ,of the guide opening.

The invention also consists of the parts and combinations of parts hereinafter described.

The invention is illustrated in the 4accompanying drawing, referring to' which- Figure 1 is a front/elevation partly in section of the preferred form of my device;

Fig. 2 is a plan; and

Fig. 3 a front elevation of a modified arrangement.

Referring to the drawing, and in detail, A designates the tracker; B the perforated note sheet; C the spool or roll on which the note sheetA is wound; and D the drawing roll which is actuated by any suitable gearing to draw the note sheet over the tracker. These parts are arranged in a frame and the music spool is held in bearings and normally pressed to the right by a spring 10 and engaging plunger 11. These parts are arranged in the ordinary way and need no fury ther description.

The tracker is provided with a' single guide opening 12, which is arranged to come just at the edge of the note sheet when the same is in normal position laterally on the Patented Feb. 5, 1918.

tracker. This guide ably made narrow a l opening communicates byatube 13 with-a pneumatic adjusting mechanism arranged as hereinafter descrlbed. The tube 13 conopening 12 prefern vnects with a valve casing X, and under a diaphragm lflrarranged therein. -This diaphragm is arranged to operate a double valve ilo-16, which double valve controlsy the iow of air into and out through pas-V sage 17. The valve casing X is arranged on a block E secured to which matic motors F and Glonnected to operate together by a link 18. A chamber is formed in the center of this block E, and arranged in the same is a pneumaticvH, one side of which is secured to the block E and the other side of which is free to swing on the hinge 19 of the pneumatic H.

A spring 20 is arranged normally to force the movable leaf of the pneumatic to the right. A passage 21 is formed in thevblock E to form a continuation of the passage 17, and the passage 21 communicates vwith the long. This guide y are two. pneuf inside of the pneumatic H. The chamber in j the inside of the block E is connected to the vacuum inducing apparatus of the instrument by a pipe 22, and this chamber communicates with the space above the diaphragm 14 by'a passage 23.

A passage 2 4l extends u wardly fromeach pneumatic m/otor F and into a horizontal passage 25' communicating both with the said chamber and the atmosphere. Coperating with each passa e 25 4is a double valve 265-27. The Inova le leaf 19 of the pneumatic H is provided with an arm 28 which extends between the valves 26.' IThe righthand pneumatic motor G connects by link 29, pivoted bell-crank 30, link 3l, arm 32, shaft 33, and cam 34 to operate the plunger ,or socket piece 35 which holds the right hand end of the music spool C.

In operation the right hand edge of the music sheet will just cover or uncover the narrow guide opening 12. As shown, the music sheet has just been moved to cover the guide opening 12. This will allow the diaico and G normall 21. The spring 20 will now force the movable leaf 19 of the pneumatic H to the right. The double valves 26 and 27 are normally pulled inwardly by the exhaust in the chamber in the block E, so that both pneumatic motors F and G normally will be open to the exhaust in said chamber and thereby balanced. As the pneumatic Il collapses, the right hand double valve 26-27 will be moved to the position shown, which will allow atmospheric air to enter the right hand pneumatic motor G. r)This will cause the movable leaf of this pneumatic motor to move to the right, which, through the connections described, will move the music spool C to the left and ing 12.

vAs soon as the guide opening 12 is uncovered, atmospheric air will iow through the same and through tube 13 under diaphragm 14. This will lift the double valve 15-16 and allow atmospheric air to How through passages 17 and 21 into the pneumatic H. which will cause the movable leaf of the same to swing to the left, which will allow the right hand double valve 26-27 to assume its normal position, but will move the left hand double valve 26--27 outwardly and `connect vthe left hand pneumatic motor F to the atmosphere. This will, cause the movable leaf the left hand pneumatic motor F to move to theleft, which, through the connections described, will.vl cause the music spool C to move to 'the right under the tension of the spring 10, which will cause the note sheet to move to cover the guide opening 12. This covering and uncovering of t e guide opening 12 will take place very quickly, and will cause a slight fluttering action of the pneumatic motors and a slight iuttering action of the note sheet, but this fluttering action will be restrained tov very slight limits, and by this operation the note sheet will be guided in its travel in proper tracker bar. i.

As previously stated, both pneumatics F are open to the exhaust and thereby ba ance each other. The normal position of the note-sheet B on 'the tracker A is 'when the note-sheet slightly uncovers the guide opening 12 so that a slight volume ci' atmospheric .air will flow through pipe 13' under diaphragm 14C, and by reason of the bleed, will-.cause said diaphragm lightly to bear on the double val ve 15 and 16 so as partially to lift the same to allow a Suction around the valve 15 and also a flow ef atmospheric air around valve 16 into passage-way, 17' so as to cause such pressure in the pneumatic H as to allow the movable leafthereoii te move far enough to the left against" the pressure oli the spring 20 to cause the arm 28 to come to central position between the two double valvesuncover the guide fopen-I out for relation across the' message the note sheet to cover and uncover the guide opening instead of the surface of the note sheet. In this arrangement the guide opening l2 is formed in a block 36 secured to the frame, and is controlled by a pivoted valve' 37 which is actuated by pivoted lever 88 which is prsed to the left by a light spring 39, and which connects by a link 10 to said pivoted valve 37. The lever 38 eX- tends through a hole 4l for/med in the tracker f bar in position to engage the 4edge of the sheet. This modification works the same as the device previously described, except that the covering and uncovering of the'guide opening is effected by the edge instead of the surface of the sheet.

It will be noted that the music sheet is guided entirely by one edge, which is desirable, as this will eliminate ditliculties arising from expansion and contraction of the sheet and varia-tions in the width thereof.

It is within the scope of my invention to connect the pneumatic motors to shift the tracker instead of the note sheet.

Many othermodifications may be worked practising my invention without departing from the scope `thereoiI as eX- pressed in the claims.

Having thus fully described my invention, what I claim is:-

l. The combination of a tracker, means for drawing a note sheet across the tracker, a single guide opening, two pneumatic mo-f 110 v tors for adjusting the lateral relation of the note sheet and tracker, a valve controlled by said guide opening, a pneumatic controlled by said valve, and valves operated by said pneumatic for controlling the motor pneumatics.

2. The combination of a tracker, means for drawing a note sheet acrossthe tracker( a single guide opening, two pneumatic motors for adjusting the lateral relation of the note sheet and. tracker, a double valve controlled by said guide opening, a pneumatic controlled by said double valve, and two double valves controlled by said pneumatic for controlling the-operation of the two motor pneumatics.

3. The combination of a tracker, meansy for drawing a note sheet across the tracker, a single guide opening, two motor pneumatics for adjusting lateral relation of .13o

the note sheet and tracker, a double valve my hand, ir the presence of two subscribing controlled by said guide opening, a springwitnesses. pressed pneumatic controlled by said double Valve, and double valves controlled by said spring-pressed pneumatic for controlling the Witnesses:

action of the two motor pneumatics. HERBERT SIMPSON,

In testimony whereof I have hereunto set W. E. RAMMELKAMP.

THOMAS DANQUARDI. 

